Motor for driving sewing-machines.



Patented Dec. 3|} l90l.

H. R. WELL MAN. MOTOR FOR DRlVlNG SEWING MACHINES.

(Applicnion filed June 6. 1901.|

(No Model.)

ATTORNEY UNITED STATES.

ATENTw OFFICE.

HAROLD ROBINSON WELLMAN, on NEW YORK, N. Y Ass1oNoR TO GENERAL INoANDEsoE T'Ano LIGHT COMPANY, on NEW YORK, A CORPORATION.

MOTORFOR DRIVING SEWING-MACHINES.

SPECIFIGATION formingpart of. Letters Patent No. 690,334, dated December 31, 1901. t

' Application filed June 6,1901. Serial No. 63,482. (No model.)

To alZ whom' it may concern:

Be'it known that I,,I-IAROLD ROBINSON WELLMAN,a citizen of the United States, re-

siding at New York city, countyand State. of New York, have invented certain new and useful Improvements in Motors-for Driving Sewing-Machines or'otherSimilar Apparatus, of which the following is a specification.

My invention relates to the construction and mounting of anelectric motor designed for driving sewing-machines or other similar apparatus. 7

The object of my invention is a construc-' tion by means of which, through the medium of afoot-treadle, the motor may be thrown into and out of operation and different speeds of movementimparted to the driven machine at the will of the operator.

The accompanying drawings will illustrate my invention, in which- Figure 1 is'a sideelevation ofa motor mounted upon a table in proximity to the machine to be driven and also illustrates the mounting, foot-treadle,and the connecting mechanism. Fig. 2 is an end view lookingfrom the left. Fig. 3 is a top view showing the relation between the wheel to be driven and the driving-wheel and indicating in dotted lines the lateral movement of the driving-wheel relativeto the driven wheel. Fig. 4 is a side serve to elevation and vertical section taken on the line XX of Fig; l.

In the drawings, 5 represents a table, such as is commonly used with sewing-machines and other similar apparatus. Mounted upon this table is a machine to be driven, such as a sewing-machine, (notsh-own,) and carrying a driving-wheel 6, which in the present case is supposed to be arranged transversely of the longitudinal axis of the table. Mounted upon and secured to the table by means of the clamp 7 is an electric motor 8. The motor is provided with the usual armature, (not shown), and on the inner end of the armature is mounted a disk-wheel 9, whose longitudinal axis corresponds to that of the table-11. e. at right angles to the longitudinal axis of the wheel 6. The face of the wheel 9 is formed of a plate of leather 10 or other suitable resilient material which will have a frictional relation with the periphery of the wheel 6.

The motor 8 is adjust-ably mounted in the bifurcated standard 11, which standard has a pivotal bearing upon the horizontal pin 12, 'fiXed'in the standards 13 13 on the upper portion of the clamp 7. Secured to the standard13 by the screw 14 is aplate 15, inwhich is formed the arc-shaped slot 16. e

17 indicates a screw located in the slot 16 and secured in the standard 11. Surrounding the pin 12 is'a helical spring 18, secured at one end'to the standard 13 and at the opposite end to the screw 17.

'It' will be understood from the description so far as described that the motor Shas a pivotal movement on the pin v12 and that this movement is limited to the length of the arcshaped slot 16, and, further, that by reason of the action of the spring 18 the motor will normally'occupy the position shown in Fig.

2t'. 8., with the screw 17 toward the righthand end of the slot 16. The purpose of this arrangement will hereinafter be described.

Pivotally mounted on the right-hand end of the pin 12 is a bell-crank lever 19,-Fig. 4. The horizontal arm 19 of this lever is pivotally connected to the adjustable rod 20, which is connected at its lower end to the foot-treadle The vertical end 19 of the lever 19 has secured to it a rectangular plate 22, preferably formed of insulating material and carrying on its inner side a metal plate 23.

Mounted upon the standard 11 and insulated from the standard are the contacts 24, connected to conductors 25, which lead to the interior of the motor-case. With the parts in the position shown in Fig. 4 the plate 23. bridges the contacts 24 and serves to close the circuit between them.

26 represents conductors leading from the source of energy to and from the motor.

The operation of my device is as follows: Normally the parts will occupy the position shown in Figs. 1, 2, and 3 of the drawings. When the foot-treadle is depressed, the bellcrank lever 19 is drawn down, the effect of which is first to bring the plate 23 in contact with the contacts 24, Fig. 4, and close the cir cuit through the motor. As the lever is fur* ther depressed the motor and its standard are tilted to the left. This causes the disk wheel 9 to move across the edge of the driven wheel (3, with the result that motion is transmitted to the driven wheel. The speed of movement, it will be understood,will depend upon the degree to which the motor is tilted until the limit of the slot 16 is reached.

In this'specification I have described the motor as mounted upon apivoted support and oscillating relative to the driven device. Manifestly the motor may be otherwise mounted and move so as to transmit different speeds to the driven device.

Having thus described my invention, I claim- 1. In combination with a driven wheel, a horizontally-pivoted motor device carrying a driving-wheel in frictional relation with and disposed at right angles to the driven wheel, and means for varying the speed of rotation of the driven wheel.

2. In combination with a driven wheel, a horizontally-pivoted motor device carrying a I driving-wheel in frictional relation with and disposed at right angles to the driven wheel, and means for moving the drivingwheel across the periphery of the driven wheel.

3. In combination with a driven wheel, a horizontally-pivoted motor device carrying a driving-wheel in frictional relation with and disposed at right angles to the driven wheel, means for establishing an electric circuit through the motor, and means for moving the driving wheel across the periphery of the driven wheel.

4. In combination with a driven wheel, a horizontally-pivoted motor device carrying a driving-wheel in frictional relation with and disposed at right angles to the driven wheel, a foot-treadle, and means interposed between the foot-treadle and the motor device for establishing an electric circuit through the motor and causing the driving-wheel carried by the motor to be moved across the periphery of the driven wheel.

5. In combination with the driven wheel, a horizontally-pivoted motor device carrying a driving-wheel, a body of frictional material mounted on the face ofthe driving-wheel and in contact with the periphery of the driven wheel, and means for causing the drivingwheel to move across the periphery of the driven wheel.

6. In combination with an electric motor carrying a driving-wheel, a supporting-standard in which said motor device is vertically adjustable, a support for said standard, and a clamping device for securing said support to a table or other body.

7. In combination with an electric-motor detive to the driven device, and means for limiting the degree of movement of the motor device.

8. In combination with an electric-motor device carrying a driving-wheel, a support for said motor, a resilient device for maintaining the original position of the motor, means for moving the motor and its support, and means for limiting the movement of the motor and its support.

9. In combination with an electric motor carrying a driving-wheel, a horizontally-pivoted support for said motor carrying electric contacts, and means for moving the motor and its support, and for closing the circuit through said contacts.

10. The combination of an electric motor carrying a drivingwheel, a support therefor, a clamping-standard, a pin carried in said standard, and on which said support for the motor is mounted, a slotted plate connected to said support for limiting the degree of oscillation of the motor, a bell crank lever mounted on said pin, and a foot-treadle connected to the bell-crank.

11. The combination with an electric motor carrying a driving-wheel, a support for said motor carrying electric contacts, a pivoted bell-crank carrying contacts in circuit with a source of electric energy, means for moving said bell-crank to close circuits through the motor and for moving the motor and its support.

12. The combination with an electric motor carrying a driving-wheel, a pivotal support HAROLD ROBINSON WELLMAN.

Witnesses:

E. S. ISHAM, Jr., I. WERTHEIMER. 

